My house has an unreliable well. It runs dry every summer. How can I reduce the water needs in my garden?

Use rain barrels and collect valuable rain water — it’s charged with 30-40 per cent oxygen (good for everything you grow) and it is always warm. Plants like this.

And mulch. June is a great month to put down six to eight centimetres of ground-up cedar bark mulch to insulate the soil. It reduces the amount of water needed by up to 70 per cent and weeding by up to 90 per cent.

Like most committed gardeners, I have been thinking a lot lately. When you are hoeing down weeds, trimming winter-damaged shrubs, planting, mulching, digging and generally mucking about in the dirt, all kinds of things pass through your mind.

We are engaging our body in gardening activity and also engaging our head in thinking activity. In fact, to a very large extent, that is the point of the exercise. A morning of gardening not only clears the mind, it generates some pretty awesome thoughts. I can’t tell you how many times I have come back into the house with a thought on my mind that I absolutely must share. “Say honey, I was thinking . . . ” and that is my wife’s first clue that my time out there has been productive. Or not, depending on the thought.

It is a great relief, then, that Queen Elizabeth’s former doctor recently made the following proclamation: “We should prescribe more gardening and we need more public parks and gardens.” According to Sir Richard Thompson, who was one of 12 speakers at the AIPH International Green City Conference in London in early April, there are huge potential savings to the U.K.’s National Health Service. “I suggest that we should prescribe more gardening and make more gardens. We want more parks,” he said.

Thompson, who was the doctor to Her Majesty for 21 years before retiring from active practice, said the benefits of gardens to mental and physical health have been known for centuries. He cites the court gardens of Egypt that were created for good mental health and he drew attention to Japan, where there is a long history of contemplation gardens. Thompson referenced a 2002 study by RobertUlrich in which hospital gardens were found to improve the mood of patients and reduced the stress of families and staff alike.

He noted that having ornamental plants outdoors and indoors led to less use of painkillers and that just viewing plants improved people’s heart rates. As well, trees and parks help remove harmful particles from the air, another massive cause of disease.

Former royal doctor Sir Thompson explained, “Inactivity is the fourth leading cause of death. We must increase activity and improve the environment for people to exercise in. A lot of people think that backs are damaged by gardening but if you garden properly, it increases the strength of your back. Some people say there is a gym outside of your window.” He pointed out that digging burns more calories than running on a treadmill.

Finally Thompson drew attention to the cash-strapped municipal budgets for parks and trees and begged that politicians search for answers to funding. Citizens also have a responsibility to draw the issue of public green spaces to the forefront of campaigns during an election. [Remember: trees and green spaces do not have a voice until we give them one.

Digging in: In other news, a recent survey of Americans concluded that the popularity of food gardening is on the rise. According to the National Garden Association, there’s been a 17 per cent jump in households growing fruits and vegetables. In 2013, an estimated 42 million homes south of the border enjoyed harvesting their own garden goodies. They spent about $3.5 billion on food gardening last year.

People ages 18 to 34 make up the fastest growing population of home gardeners. This demographic doubled its spending on food-related gardening supplies. Households with children also took up the trowel and rose by 25 per cent over five years.

Urban farming on rooftops and patios is sprouting at a quick pace. There are now more than 9 million of them in the U.S.

It’s reasonable to suggest the per-capita investment in food gardening here may be even greater than the usual 10 per cent we apply to indicate Canada’s role compared to the U.S. Similar stats published in the past have indicated that Canadians generally throw ourselves into the thing with greater enthusiasm than Americans. Is this due to our greater propensity for physical exercise? Our need to get out of doors after a longer winter? Or are we just naturally more appreciative of the natural world around us and therefore more eager to engage in it? I will let you be the judge.

Garden trends: I have my own notions of how the business of Canada’s most popular leisure time outdoor activity is changing. We are growing more food, planting more native species in our gardens, moving in the direction of a more sustainable model for the average home garden (with a dramatic drop in the use of chemicals) and we are introducing our children and grandchildren to the natural world of soil, plants and trees to a much greater degree than we did just a generation ago. An American survey of garden writers confirms much of what I believe to be true:

Susan McCoy, president of Garden Media Group and an American garden trends spotter says, “We are beginning to truly understand the relationship between gardening and connecting with nature — and how this can lead to a fully satisfied, purposeful life.”

Her observations include:

A greater number of chickens being raised in urban environments by “backyard chicken enthusiasts.

Mixing them up — gardeners are integrating edibles into woody landscapes and perennial gardens. We’re also planting more native species to benefit pollinating bees, hummingbirds and butterflies; recycling objects into plant containers and using Pinterest to share ideas and inspire others to garden.

Where ornamental gardens are concerned, colour is king. The market is now rife with new introductions of annual and perennial “ever bloomers.” Check out the new petunias, geraniums, heuchera, gaura and, for outstanding foliage and flowers, hosta varieties.

Embracing imperfection. The idea of the perfectly quaffed, trimmed and sculpted garden is now dead (according to me). Susan puts it this way: “Homeowners are relaxing their notions of what’s ‘right’ in their landscapes to embrace seasonal drama and its disorder.”

Mark Cullen is an expert gardener, author, broadcaster and garden editor of Reno and Decor magazine. Get his free monthly newsletter at markcullen.com, and watch him on CTV Canada AM every Wednesday at 8:45 a.m. Follow him on Twitter @MarkCullen4 and Facebook.